Can be..because it's always running. And it had high percentage because none other things were using the battery much. If you use your phone more, then screen will definitely used more battery than systemui. I usually get 50-60% for screen. Systemui not much cause I am not using halo/pocket mode. But then, maybe you can try a clean flash. Could be a result of a bad flash too.

Thank you I solved this problem! I switched off the notification on lockscreen and now screen is about 40%.

But my battery life is always very bad... 1% for 1 minute onscreen. Do you think is a battery or a software issue?

Thanks in advance

Nice. Btw, lockscreen notif doesn't drain much. It's the pocket mode in lockscreen notif that is. Try to do a battery recalibration and install better battery stats to see what apps/things that are causing any wakelocks. It's the best way to troubleshoot battery problems.

XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality.Are you a developer?